Grindelia has a calming effect on the heart muscles, which makes it effective in the natural treatment of asthma and bronchial conditions, particularly when these are linked with an increase in the rate at which the heart beats and nervous response.It is also used an herbal remedy for whooping cough and respiratory catarrh.It is a potent expectorant, which helps clear up severe congestion that occurs in the case of chronic bronchitis, asthma and emphysema.In addition, it is used as an antispasmodic and a urinary tract disinfectant.Grindelia has also been used for a long time as a remedy for dermatitis caused by poison oak or poison ivy.